Question 1
In a sample of air at STP, the ratio of the root-mean-square velocity of O
2 to that of N
2, that is
urms(O
2)/
urms(N
2), is equal to ________.
◦ 0.88
◦ 0.94
◦ 1.00
◦ 1.07
◦ 1.14
Question 2
In the reaction

how many liters of hydrogen at STP are produced from 50.0 grams of sodium

◦ (55.0/18.0)(22.4) L
◦ (50.0/23.0)(22.4/2) L
◦ (50.0/23.0)(2)(22.4) L
◦ (50.0/23.0)(22.4) L
◦ (55.0/23.0)(22.4) L